2017 Lexus IS 300 Fuel Economy Issues

Reply Subscribe

Thread Tools

Search this Thread

11-26-18, 05:20 PM

#16

sunamer

Advanced

Join Date: Nov 2018

Location: OK

Posts: 621

Likes: 177

Received 183 Likes on 130 Posts

Quote:

Originally Posted by dejanh

As as I mentioned above, I’m concerned that there may be an actual problem with the vehicle itself causing such excessive fuel burn, but I’m not sure how to even test the theory. The numbers I’m getting are so out there I am quite stunned.

I noticed when I first got the car, my mpg was 12-15 with 70/30 city/highway. Drive your car for a week or two and get better averages. Driving in sport or sport plus for a while will definetely give you 10-12 mpg.

Reply Like

11-26-18, 06:31 PM

#17

EZZ

Lexus Test Driver

Join Date: Jan 2007

Location: CA

Posts: 7,460

Likes: 11

Received 228 Likes on 171 Posts

I drive my IS350 pretty hard. I mean daily triples and redlined everyday. My average mpg is still 17-18 mpg with a 50/50 highway city mix. Seems 10-12 is too low.